Butt welded joint for sheet pilings



'July- 31, 1934. w. PRIELIPP BUTT WEL'DED JOINT FOR SHEET PILINGS FiledFeb. 16, 1933 Fig.1

I!!! iiililidllll- III/[ll]! IlIlllIllllllllllllllllllllllllllllll Q 6 AN 8 s /n vemon." 14K Pricili Patented Jui v i934 UNITED STATES PATENTOFFICE Walter Prielipp,

Dortmund, Germany, assignor to the firm Vereinigte StahlwerkeAktiengesellschaft, Dusseldorf, Germany Application February In Germany16, 1933, Serial No. 657,088 February 26, 1932 2 Claims. (Cl. 61-60) Theinvention relates to a butt-welded connection of sheet pilings and themethod for the manufacture of said connections.

Hitherto butt-welded joints have been rigidly constructed. However, thisrigid connection in case of iron sheet piling is often disadvantageous,since iron sheet pilings serving for instance for tightening a retainingdam must be capable of following the settling and other elastic motionsof the soil. The pile planing musttherefore be elastic and yielding to aconsiderable degree.

According to the invention, the drawbacks connected with the known rigidbutt weld are eliminated by adapting the butt plate inserted between thefaces of the pile portions to be joined to the sectional form of thesheet pile. In this way, when the pile is bent or upset, the joint canfollow, and cooperate in carrying out, sectional deformations of anypile section. The known types of continuous butt-plates would renderalterations of cross-section of the joint impossible, which would createsuch unfavorable stresses just at the joint that the welds would be tornup and the planking lose its usefulness. A butt plate adapted to theshape of the profile afiords further the advantage that a profile thusjoined can be rammed without difiiculty and the soil when settling willnot adhere thereto.

Moreover the sheet pilings can be composed of several pieces of anydesired length without affecting their elasticity, so that instead ofexceedingly long piles, the transport of which is difficult, normallengths can be used and even short waste pieces can be composedaccording to the invention to piles of normal'length which are well tobe utilized. Furthermore it is possible to enlarge piles which alreadyhave been rammed, if afterwards a change of the length of the pile isrequired.

The illustrations show by way of example the joint of a U-shaped sheetpiling, Fig. 1 being a cross section according to line 1-1 of Fig. 2,

Fig. 2 a side view thereof and Fig. 3 a perspective view of the pilingparts lying in the near of the .butt joint and of the butt plateinserted therebetween.

The portions (1 and b of the piles are welded together by means of thebutt plate 0 which is shaped like the profiles to be joined. In thepresent case it is of U-like shape corresponding to the shape of thepile. The outer ends of the butt plate 0 may extend only up to theconnecting grooves, leaving said latters free, so that the next pile maybe inserted at a staggered joint lying in a different plane, though thebutt plates may also be extended to the center of the connecting grooveand the joints of adjacent planks may be arranged on the same plane.

Moreover, the shape of the profile (pilings of Z- or other form) and themanner of connection of the joints has no bearing on the invention.

What I claim and desire to secure by Letters Patent of the United Statesis.

1. Transverse butt weld joint for sheet pilings, comprising at least twosheet piles of a desired profile lying with their ends opposite oneanother and. leaving a space room between them, a butt plate in thespace room, the said plate having substantially the, shape of the pilingprofile, and beads at either side of the butt plate.

2. Transverse butt weld joint for sheet pilings, comprising at least twoU-shaped sheet piles being provided with lock parts and lying with theirends opposite one another and leaving a space room between them, a buttplate in the space room, the said plate consisting of sheet metal andhaving an U-like outline corresponding to the U-shape of the sheet pilesbut being somewhat larger than the latter, the ends of the said buttplate leaving free the lock parts of the sheet piles, and beads ateither side of the butt plate.

WALTER PRIELIPP.

QEREiFFi'CA'iE 6i GGRRECTEON.

No. 1,968,220. Euiy BR, 1934 WALTER PRlIi-JMPP.

it is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows; Page i, inthe heading is: the printed specification, date of fiiing application inGermany, for "Feb rnnry 26, 1932" read February 26, i931; and that thesaid Letters Patent. shoniii be read with this correction therein thatthe same may conform. to the record of the case in the Patent Office.

igned and sealed this 16th day of October, A. D. 1934.

Lesi ie Frazer (Seer!) Acting Commissioner of Patents.

